Queston about 'out of tune'.

[Buz]

When the V1 drifts out of tune, what are the symptoms?
- Does it get weaker readings on certain/all frequencies OR does it just completely miss certain frequencies while still hitting full on other frequencies?
Never really understood.

[KnightHawk]

Poor alert to a combination or single band. Noticed to have X and K band drift off more often than Ka band on pre POP units. Had my 826 for 4 years with no tune ups and still has stellar performance other than the "J" alert suppression.

Just wondered if the POP units requires less tune up maintenance than the pre POP units.

[srtga]

Mine went completely dead on K band. I could park directly in front of a known K door opener and get no alert. Mine was used so I can't say if it dropped off first or just went dead.

The Ka was still working and seemed to be better than my 8500X50.

[kpatz]

X and K are relatively narrow bands so if the LO drifts out of tune these are the first bands to be affected. Ka is a very wide band (33 - 36 GHz) so even if the V1 drifts out of tune to miss X and K band alerts, chances are it will still pick up Ka (esp. 34.7). It may miss some 33.8 or 35.5 (but not both) depending on which way out of tune it is, if it's far enough out. Chances are, you'll be sending it in due to K band well before Ka is affected.

[KnightHawk]

X and K are relatively narrow bands so if the LO drifts out of tune these are the first bands to be affected. Ka is a very wide band (33 - 36 GHz) so even if the V1 drifts out of tune to miss X and K band alerts, chances are it will still pick up Ka (esp. 34.7). It may miss some 33.8 or 35.5 (but not both) depending on which way out of tune it is, if it's far enough out. Chances are, you'll be sending it in due to K band well before Ka is affected.

Makes sense.

[djrams80]

The 3.812 I recently aquired was totally dead on X and K band. And according to the Professor, the term "tuned" is erroneously used on this forum, as it relates to a V1 that's not operating properly. When a V1 has problems, it's because there is has a component failure. VR does not open the V1 up and twist a few pots or something. To fix the problem, they replace the failed component.

http://www.radardetector.net/forums/...islike-v1.html

I think certain members on this forum enjoy spreading the false notion that "all V1's have to be sent in periodically for a 'tune up'"

Also, the phrase "out of tune" is really a misnomer. They're not going to just turn a couple of screws inside to put it back "in tune" and send it back to you. If a V1 is failing to alert to radar, there is a component failure, plain and simple.

[KnightHawk]

The 3.812 I recently aquired was totally dead on X and K band. And according to the Professor, the term "tuned" is erroneously used on this forum, as it relates to a V1 that's not operating properly. When a V1 has problems, it's because there is has a component failure. VR does not open the V1 up and twist a few pots or something. To fix the problem, they replace the failed component.

If it is the case, why X and K band not Ka? Seen this with 789, 812 and 813 units. Does it also mean that components for X and K band break much quicker than Ka band components?

[Cips]

The 3.812 I recently aquired was totally dead on X and K band. And according to the Professor, the term "tuned" is erroneously used on this forum, as it relates to a V1 that's not operating properly. When a V1 has problems, it's because there is has a component failure. VR does not open the V1 up and twist a few pots or something. To fix the problem, they replace the failed component.

If it is the case, why X and K band not Ka? Seen this with 789, 812 and 813 units. Does it also mean that components for X and K band break much quicker than Ka band components?

Does this answer your question?

X and K are relatively narrow bands so if the LO drifts out of tune these are the first bands to be affected. Ka is a very wide band (33 - 36 GHz) so even if the V1 drifts out of tune to miss X and K band alerts, chances are it will still pick up Ka (esp. 34.7). It may miss some 33.8 or 35.5 (but not both) depending on which way out of tune it is, if it's far enough out. Chances are, you'll be sending it in due to K band well before Ka is affected.

[KnightHawk]

Cips, check out post #5.

[Buz]

X and K are relatively narrow bands so if the LO drifts out of tune these are the first bands to be affected. Ka is a very wide band (33 - 36 GHz) so even if the V1 drifts out of tune to miss X and K band alerts, chances are it will still pick up Ka (esp. 34.7). It may miss some 33.8 or 35.5 (but not both) depending on which way out of tune it is, if it's far enough out. Chances are, you'll be sending it in due to K band well before Ka is affected.

Understood, thank you.
So then gradual sensitivity weakening of the V1 is not an issue. It's either receiving and reporting the frequency normally or it's totally missing it, right?